Trent Piepho wrote:
On Sat, 6 May 2006, Johannes Stezenbach wrote:
On Sat, May 06, 2006, Trent Piepho wrote:
My thought would be that GET_PARAMS with delivery set to FE_DELSYS_IGNORE
would just return frequency. SET_PARAMS with FE_DELSYS_IGNORE would just set
the frequency (and inversion? Why is inversion here?) and leave the rest of
the parameters as is.
It's not specified anywhere, but I thought that GET_CAPS with delivery
set to FE_DELSYS_IGNORE (wasn't there a QUERY before?) would return
the supported delsyses. Like this:
int check_for_atsc(int fd)
{
struct dvb_frontend_cap;
cap.delivery = FE_DELSYS_IGNORE; // Get FE type
Thanks, now I get why there once was a FE_DELSYS_QUERY. This
is totally not obvious from reading frontend.h, it needs to
be documented with a comment.
Well, that's how *I* thought it would work. I guess Manu has another idea.
I thought ignore for all the various params was only for GET_PARAMS, to avoid
unnecessary I2C traffic. GET_CAPS just returns constant values, I can't see
what point IGNORE would have. I just makes get_params in the driver more
complicated.
There is no real spec or example code yet, so I will write some for
FE_GET_CAPS. I hope Manu will correct what I get wrong. IMHO, nothing
I'm writing contradicts anything in Manu's latest multi-protocol support
patch.
Trent,
I will get back on this
Manu
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